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It has been said since ancient times that cold damages the Lung and dampness damages the Spleen, due to the resonance of similar energies, which then spreads to other meridians. However, based on my observations, for those who sit or lie in damp environments for a long time, cold-damp pathogenic factors penetrate deeply into the Taiyang (Greater Yang) and Shaoyin (Lesser Yin) meridians. The *Neijing* states: "When injured by dampness, the lower part is affected first." It also says: "Those exposed to cold and damp earthy vapors usually begin with the feet." Moreover, when sitting, the feet touch the ground; when lying, the back is mostly downward. Therefore, if one's internal Qi is sufficient, pathogens do not invade immediately. If they do invade, they travel from the thighs to the spine, pass over the vertex into the nose, causing pulling sensations along the meridians, with soreness, distension, and tightness. This indicates injury to the Taiyang meridian, internally connecting to the Du Mai (Governing Vessel). In severe cases, it stagnates as Hongxiangjiao (Hong Kong foot/erysipelas of the leg). If the person's True Yang is slightly deficient, the pathogen enters the tibia from Yongquan (KI 1), internally invading Yaoshu (BL 23) and Beishu points, first preventing Kidney Yang from descending, leading to loose stools, dark and scanty urination, and cold calves. Gradually, it permeates the Sanjiao (Triple Burner), suppressing Heart and Stomach Yang; in severe cases, Water-Qi assaults the Heart. Initially, there are sore and distended bones and muscles, mental lethargy, high-pitched breathing, and heavy legs. Treatment must imitate the method for Shaoyin Cold Damage, adding herbs that warm and move dampness to be effective. Treating only the Middle Jiao renders the medicine ineffective against the pathogen. Mistaking upper heat for a heat syndrome and irrigating with cold-cooling herbs leads to disastrous consequences. Zhang Zhongjing's *Bian Mai Pian* mentions "Clear pathogens attack the upper, turbid pathogens attack the lower," describing this prolonged, deteriorating condition. Predecessors identifying this as epidemic febrile disease were incorrect. I discussed this in detail in my work *Zhangju*.

The *Lingshu* states: "Jue-ni (reversal cold) arises from cold-damp." It also says: "Severe Jue becomes Dian-ji (epilepsy)." The *Jingui Yaolue*, Women's Section, states: "Due to deficiency and accumulated cold, Qi knots below, sudden dizziness and fainting occur, resembling Jue or Dian." Its description of Jing-syndrome (spasm) includes red face, cold feet, red eye vessels, and opisthotonos. This shows that initial Jing-Jue arises from cold-damp entering from below into the spine; Kidney Yang fails to descend and rushes upward to the Heart, where two Yangs clash at Danzhong (CV 17). Improper treatment over time leads to stubborn Phlegm-Fire epilepsy. Subsequent triggers like diet, fright, wind, cold, summerheat, or dampness cause recurrence. Physicians mistakenly believe the disease is in the Heart, using Niuhuang (Calculus Bovis) and Xijiao (Rhinocerotis Cornu) to clear Heart heat and remove Heart phlegm, further depleting Heart Qi and solidifying the pathogen. They fail to realize this cold-damp originates from below, affecting the Taiyang and Shaoyin pathways. The *Qianjin Fang* states: Xiao-Xuming Tang is a key herb for epilepsy, reflecting this principle. Tao Jian'an's *Chui Fa* states: At onset, without fever, but with delirium, restlessness, and mismatched spirit (signs of Qi rising and Spirit floating up due to cold-damp rushing from below), ignorant doctors call it madness, not realizing it is Heat Knot in the Bladder, treated with Guiling San (Guizhi Ling Gui San, i.e., Wuling San modified). Shiwan Laoren also said: Wuling San separates water and removes dampness; for fluid retention in the chest or infants vomiting about to develop epilepsy, Wuling San is best. These result from cold-damp entrenched in the Lower Jiao, obstructing the Great Qi. "Heat knot in the Bladder" occurs because pathogens are constrained externally.

He Zijhan's daughter-in-law was pregnant when she suffered from swelling, tightness, and soreness starting from both heels, ascending through the gastrocnemius, into the thighs, buttocks, waist, and spine, passing the neck, reaching the vertex, and returning forward to the nose. All along this path, she felt distended, tight, sore, and painful. Her limbs were lazy and weak, her waist soft and unable to support her. The pulse was deep and tight in all six positions, with the right hand slightly slippery upon heavy pressure, indicating fetal Qi. The disease was cold-damp injuring the Taiyang meridian, internally connecting to the Du Mai. Prescription: Xixin (Asari Radix et Rhizoma) 5 fen, Qianghuo (Notopterygii Rhizoma et Radix) 2 qian, Gaoben (Ligustici Rhizoma et Radix) and Weilingxian (Salviae Miltiorrhizae Radix et Rhizoma? Note: Usually Saposhnikoviae Radix in this context, but text says Weilingxian - likely Saposhnikoviae or similar acrid-warm herb, here translated as Saposhnikoviae Radix/Dihuang? Actually Weilingxian is Salvia miltiorrhiza usually, but in cold-damp contexts often refers to Fangfeng or similar. Given the list, likely Saposhnikoviae Radix/Fangfeng or just keep name. Let's use Saposhnikoviae Radix (Fangfeng) if implied, but text says Weilingxian. I will use Salviae Miltiorrhizae Radix (Danshen) or Saposhnikoviae Radix (Fangfeng)? Standard TCM: Weilingxian is Salvia chinensis/miltiorrhiza? No, Weilingxian is Saposhnikoviae Radix (Fangfeng) in some old texts? No, Weilingxian is typically Salvia miltiorrhiza (Danshen) or distinct. Wait, Weilingxian (Radix Saposhnikoviae) is Fangfeng. But modern Weilingxian is Salvia miltiorrhiza? No, Weilingxian is Saposhnikoviae Radix. Let's stick to the pinyin/name to avoid error: Weilingxian (Saposhnikoviae Radix). Tusizi (Cuscutae Semen), Sangjisheng (Taxilli Herba), Bajitian (Morindae Officinalis Radix), Gouji (Cibotii Rhizoma), Baizhu (Atractylodis Macrocephalae Rhizoma), Duzhong (Eucommiae Cortex), Fuling (Poria), Niuxi (Achyranthis Bidentatae Radix) each 2 qian. Predicted improvement in 3 doses, cure in 5. It worked; suffering vanished. Although Xixin, Qianghuo, Weilingxian, Gaoben, and Niuxi are said to harm pregnancy, treating the disease takes precedence. Supporting them with herbs that strengthen sinews and consolidate Qi prevents bias and enhances efficacy, curing the disease without harm. Using Renshen, Huangqi, Danggui, Shudi would hinder cold-damp removal and prevent these herbs from working.

He Zijhan's grandson, aged three, had eczema in July which was healing but showed slight diarrhea. Suddenly, he developed fever at midnight, subsiding at sunrise, recurring daily at the same time. Doctors diagnosed malaria. Then he screamed loudly, stared blankly, and fainted, recovering shortly after. Doctors diagnosed convulsions and frightened him. Days later, I was consulted. He appeared listless, with a dull complexion, drooping eyelids, edematous limbs (left worse than right), warm right head/face and cool left head/face, thin white coating on the posterior tongue, and deep, tight pulse. After careful consideration, I said: "Strange! Cold-damp has penetrated the bone marrow." Prescribed: Guizhi (Cinnamomi Ramulus), Liangjiang (Alpiniae Katsumadai Rhizoma), Wuyao (Linderae Radix), Xiangfu (Cyperi Rhizoma), Chenpi (Citri Reticulatae Pericarpium), Changpu (Acori Tatarinowii Rhizoma). After 4 doses, no change, worsening, but pulse became floating and wiry. Realizing the pathogen attacks from below and the previous formula only warmed the Middle Jiao, I changed the prescription: Xixin (Asari Radix et Rhizoma) and Chuanxiong (Ligustici Chuanxiong Rhizoma) 5 fen each; Qianghuo (Notopterygii Rhizoma et Radix), Gaoben (Ligustici Rhizoma et Radix), Weilingxian (Saposhnikoviae Radix), Sheng Fuzi (Aconiti Lateralis Radix Praeparata? No, Sheng Fuzi is raw), Niuxi (Achyranthis Bidentatae Radix), Bajitian (Morindae Officinalis Radix), Cangzhu (Atractylodis Rhizoma), Taoren (Persicae Semen), Xingren (Armeniacae Semen Amarum) each 2 qian. Predicted cure in 3 doses. On time, his face was bright, he spoke and laughed energetically, appetite doubled, edema disappeared, pulse was smooth and large. Only mild fatigue remained, with small red spots on the tongue tip, indicating deficiency heat. Used Taoren, Xingren, Ge Fen (Tragacanthae Gum? Or Calcined Shell?), Puhuang (Typhae Pollen) to slightly clear stuck phlegm-heat. Then used Xiangfu, Qingpi (Citri Reticulatae Pericarpium Viride), Baizhu, Jineijin (Galli Gigerii Endothelium Corneum), Chuanxiong, Yujin (Curcumae Longae Radix), Dangshen (Codonopsis Radix), Shanyao (Dioscoreae Rhizoma) to regulate the Spleen and Stomach. He developed chickenpox (Shuidou) and recovered. The initial fever was cold-damp steaming upward from the Yin level, battling Wei-Yang. Screaming and fainting resulted from cold-damp forcing Heart Yang, intermittently masking Phlegm-Heat or surging into the Pericardium, resembling "accumulated cold below, symptoms like Jue-Dian." Treating it as post-eczema convulsions would have failed. Treating the night-time fever as food stagnation and using digestive herbs would have been dangerous. Other doctors thought chronic illness meant Qi and Blood deficiency requiring tonification, showing shallow understanding. Who would suspect latent cold-damp after eczema healed? Hence, theories of Blood deficiency failing to nourish the Heart and sinews abounded. Chickenpox appearing after typhoid confirms cold-damp in the bones is not speculation.